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Recent content by oht993

  1. O

    Huijsing Amp current consumption problem

    1) Did you do Transient simulation? 2) Have you checked the bias ckt in all corner and VDD? two things that I can think of... thanks.
  2. O

    What is the slope compensation ?

    slope compensation is a ckt that prevents the sunharmonic oscillation of the system when the system works on CCM mode
  3. O

    gm/id design technique

    oermens, Can you attach pdf files to here??? I tried to download but, first of all, can;t read "the WORD", and...I think I need to register on the site.but since I can't read it, I couldn;t do it.. thanks.
  4. O

    Vds-Vdsat to keep a transistor in saturation

    In hspice sim result, make Vod lager than Vdsat..
  5. O

    Design problem for Analog DLL

    Design problems...do you mean that how to design DLL or what is critical part of DLL design??
  6. O

    How to design a charge pump for a DLL in .18um technology

    charge pump dll I am sorry but, how do you design PFD? Well, I have designed VCDL which produce 7 different frequencies and covers 20MHz to 150 MHz. But when I simulate it with previous PFD and cp, it did not cover 150MHz... VCI from PFD shows only up voltage.... did you design FF based PFD? or...
  7. O

    Gm/Id Design Methodology

    gm/id design methodology I have same problems as you and from several papers that I had read, early voltage is needed to complete the transistor sizing. Gain equation and so forth can be expressed with gm/id, and VA I guess.... Anyway, do you know how to find gm/Id vs Id curve? many many thanks.
  8. O

    buffered opamp - GBW of 100M , PM of 60deg, dc-gain of 65dB

    buffered opamp,too miller OTA with output buffer, probably easy way to start the design.
  9. O

    Help me design CMOS Op Amp

    CMOS Op Amp design Hi you should read gray's ch6 then read allen''s op-amp chap. you will get the idea about miller OTA. thanks,
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